251946 has 12 divisors (see below), whose sum is σ = 545922. Its totient is φ = 83976.

The previous prime is 251941. The next prime is 251947. The reversal of 251946 is 649152.

251946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 35721 = 465^2 + 189^2 .

It is not an unprimeable number, because it can be changed into a prime (251941) by changing a digit.

251946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6981 + ... + 7016.

2²⁵¹⁹⁴⁶ is an apocalyptic number.

251946 is an abundant number, since it is smaller than the sum of its proper divisors (293976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251946 is a wasteful number, since it uses less digits than its factorization.

251946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14005 (or 14002 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 251946 is about 501.9422277514. The cubic root of 251946 is about 63.1590839688.

It can be divided in two parts, 25194 and 6, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 251946 in words is "two hundred fifty-one thousand, nine hundred forty-six".